This section explains how you can automatically colorize the
source code contained in <pre>,
<codeblock> or any other element specializing
<pre>.
You can automatically colorize the source code contained in
<pre>,
<codeblock> or any
other element specializing
<pre>. This feature,
commonly called
syntax highlighting, has been implemented
using an open source software component called "
XSLT
syntax highlighting 
".
If you want to turn on syntax highlighting in a DITA document, suffice
to add attribute @outputclass to a
<pre>, <codeblock> or any
other element specializing <pre>. The value of
attribute @outputclass must be any of:
language-bourne (or -shell or
-sh), language-c,
language-cmake (or -make or
-makefile), language-cpp,
language-csharp, language-css21 (or
-css), language-delphi,
language-ini, language-java,
language-javascript, language-lua,
language-m2 (Modula 2), language-perl,
language-php, language-python,
language-ruby, language-sql1999,
language-sql2003, language-sql92 (or
-sql), language-tcl,
language-upc (Unified Parallel C),
language-html, language-xml.
If you want to customize syntax highlighting for an HTML-based output
format (XHTML, EPUB, etc), then redefine any of the following CSS
styles:
.hl-keyword (keywords of a programming
language),.hl-string (string literal),.hl-number (number literal),.hl-comment (any type of comment),.hl-doccomment (comments used as documentation,
i.e. javadoc, or xmldoc),.hl-directive (preprocessor directive or in XML, a
processing-instruction),.hl-annotation (annotations or "attributes" as they
are called in .NET),.hl-tag (XML tag, i.e. element name),.hl-attribute (XML attribute name),.hl-value (XML attribute value),.hl-doctype (<!DOCTYPE> and
all its content).
§ Example: customization of the syntax highlighting of a
keyword for HTML-based output formats
.hl-keyword {
font-weight: bold;
color: #602060;
}
If you want to customize syntax highlighting for an XSL-FO-based output
format (PDF, RTF, etc), then redefine any of the following
<attribute-set>s: hl-keyword,
hl-string, hl-number, hl-comment,
hl-doccomment, hl-directive, hl-annotation,
hl-tag, hl-attribute, hl-value,
hl-doctype.
§ Example: customization of the syntax highlighting of a
keyword for XSL-FO-based output formats
<xsl:attribute-set name="hl-keyword" use-attribute-sets="hl-style">
<xsl:attribute name="font-weight">bold</xsl:attribute>
<xsl:attribute name="color">#602060</xsl:attribute>
</xsl:attribute-set>
